Mamed
Feb1-12, 04:20 AM
Hi
I am trying to solve a flow chart that has one of the nodes a constant/ambient/ground. I dont know how to go about to design this in the matrix.
What i have is kinda like the attached image.
I have that V0 is constant, and i have set the flow matrix as.
\left[ \begin{array}{cccc}
\frac{1}{R_1} & \frac{1}{R_1} & 0 & 0 \\
-\frac{1}{R_1} & \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_4} & -\frac{1}{R_2} &-\frac{1}{R_4} \\
0 & -\frac{1}{R_2} & \frac{1}{R_2}+\frac{1}{R_3} & -\frac{1}{R_3} \\
0 & -\frac{1}{R_4} &-\frac{1}{R_3} & \frac{1}{R_4}+\frac{1}{R_3} \\
\end{array} \right]
And by having the currents in as
\left[ \begin{array}{c} I0 \\ I1 \\ I2 \\ I3 \end{array} \right]
Where P0 is the negative sum of all the other values at steady state. But this will make the voltage V0 be dependant on the slow but I want it to be constant but don’t know how to make it work. I have though about just ignoring the node and thus taking away the first row and column but again I want it to somehow depend on the fact that we have a slack there.
What i wanna find out are the Voltages at the different nodes. But i cant just do V = A\I because the first one in V is to be constant.
Thanks for any comment.
I am trying to solve a flow chart that has one of the nodes a constant/ambient/ground. I dont know how to go about to design this in the matrix.
What i have is kinda like the attached image.
I have that V0 is constant, and i have set the flow matrix as.
\left[ \begin{array}{cccc}
\frac{1}{R_1} & \frac{1}{R_1} & 0 & 0 \\
-\frac{1}{R_1} & \frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_4} & -\frac{1}{R_2} &-\frac{1}{R_4} \\
0 & -\frac{1}{R_2} & \frac{1}{R_2}+\frac{1}{R_3} & -\frac{1}{R_3} \\
0 & -\frac{1}{R_4} &-\frac{1}{R_3} & \frac{1}{R_4}+\frac{1}{R_3} \\
\end{array} \right]
And by having the currents in as
\left[ \begin{array}{c} I0 \\ I1 \\ I2 \\ I3 \end{array} \right]
Where P0 is the negative sum of all the other values at steady state. But this will make the voltage V0 be dependant on the slow but I want it to be constant but don’t know how to make it work. I have though about just ignoring the node and thus taking away the first row and column but again I want it to somehow depend on the fact that we have a slack there.
What i wanna find out are the Voltages at the different nodes. But i cant just do V = A\I because the first one in V is to be constant.
Thanks for any comment.